After things take a dire turn with Despero, Barry meets Black Lightning at the Hall of Justice. Meanwhile, Iris suspects that something is off with Despero’s vision of the future, so she seeks help from a powerful ally.

Ashley Rickards, Christian Magby, Chyler Leigh, Cress Williams, Javicia Leslie, Kalvin Olafson, Lisa Chandler, Osric Chau, Paul Herbert, Tom Cavanagh, Tony Curran